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翼型最大拱度位置對軸流泵水力性能影響的模擬與試驗(yàn)
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國家自然科學(xué)基金項(xiàng)目(51376155)、江蘇省水利科技項(xiàng)目(2017031)、揚(yáng)州市科技計(jì)劃項(xiàng)目(YZ2018103)和江蘇省高校優(yōu)勢學(xué)科建設(shè)工程項(xiàng)目(PAPD)


Influence of Maximum Airfoil Camber Position on Hydraulic Performance of Axial-flow Pump
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    摘要:

    為了研究翼型拱度對軸流泵水力性能的影響,采用數(shù)值模擬和模型試驗(yàn)的方法在參數(shù)化翼型的基礎(chǔ)上,,保持升力系數(shù)大體一致,,改變翼型最大拱度的位置及高度設(shè)計(jì)得出對應(yīng)軸流泵葉輪,,分析翼型拱度對軸流泵水力特性的影響,。在二維翼型最大拱度位置為0.3L~0.65L時(shí)采用翼型優(yōu)化方法,,保證翼型的升力系數(shù)基本一致,,得到了不同最大翼型拱度位置下的翼型設(shè)計(jì)方案,;針對0.4L、0.5L和0.6L共3種最大翼型拱度位置下的翼型設(shè)計(jì)方案,,采用二維葉柵理論進(jìn)行軸流泵葉輪設(shè)計(jì),。其余設(shè)計(jì)參數(shù)均保持不變,得到3副不同的軸流泵葉輪,,將配套導(dǎo)葉,、彎管、葉輪組合成泵段進(jìn)行數(shù)值模擬計(jì)算,。最后通過泵段模型試驗(yàn)驗(yàn)證了數(shù)值計(jì)算結(jié)果的可靠性,。研究結(jié)果表明:為保證軸流泵具有較好的能量性能和汽蝕性能,最大翼型拱度最好選擇在0.4L~0.6L的位置,。當(dāng)最大翼型拱度位置為0.5L時(shí),,水泵具有較寬的高效區(qū)運(yùn)行范圍,流量揚(yáng)程曲線較為平順,。在小流量區(qū)域,,最大翼型拱度位置靠近翼型前緣或尾緣時(shí),,效率均會下降;在大流量區(qū)域,,最大翼型拱度位置越靠近翼型尾緣效率越高。隨著最大拱度位置向翼型尾緣的偏移,,水泵的汽蝕性能有一定的提高,。在泵站工程應(yīng)用時(shí),可通過改變最大翼型拱度位置來滿足泵站實(shí)際運(yùn)行的能量性能和汽蝕性能要求,。

    Abstract:

    In order to study the influence of airfoil camber on the hydraulic performance of the axialflow pump, the methods of numerical simulation and model test were adopted to do the research. The position and height of the maximum camber of the airfoil were changed to maintain the similar lift coefficient. Based on the parametric airfoil, different airfoils with different airfoil cambers were designed. The corresponding axialflow impellers on the hydraulic characteristics were analyzed. Firstly, the airfoil optimization method was adopted for the maximum camber position of the twodimensional airfoil at 0.3L~0.65L, which ensured that the lift coefficient of the airfoil was basically the same. So the airfoil design schemes with different maximum airfoil degrees were obtained. Secondly, the twodimensional cascade theory was used to design the axial flow pump impeller based on the three designed airfoil schemes of the maximum airfoil camber position of 0.4L, 0.5L and 0.6L. The rest of the design parameters remained unchanged, and the three different axialflow impellers were obtained. The matching guide vane, elbow and impeller were combined into a pump section for numerical simulation calculation. Finally, the reliability of the numerical calculation results was verified by the pump section model test. The research results showed that in order to ensure better energy and cavitation performance of the axialflow pump, the maximum airfoil camber position was preferably selected as 0.4L~0.6L. When the maximum airfoil camber position was 0.5L, the pump had a wide range of highefficiency area, and the flowhead curve was relatively smooth. In the large flow area, as the maximum airfoil camber position was closer to the airfoil trailing edge, the cavitation and the energy performance of the pump would increase. The research had important theoretical significance and guiding significance in the design of axialflow pump and practical engineering application.

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石麗建,付玲玲,夏 燁,湯方平,孫丹丹,翟林鵬.翼型最大拱度位置對軸流泵水力性能影響的模擬與試驗(yàn)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2018,49(11):148-154. SHI Lijian, FU Lingling, XIA Ye, TANG Fangping, SUN Dandan, ZHAI Linpeng. Influence of Maximum Airfoil Camber Position on Hydraulic Performance of Axial-flow Pump[J]. Transactions of the Chinese Society for Agricultural Machinery,2018,49(11):148-154.

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  • 收稿日期:2018-08-07
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  • 在線發(fā)布日期: 2018-11-10
  • 出版日期: 2018-11-10
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